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To download iCircuit from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Krueger Systems, Inc.

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iCircuit is the easiest way to design and experiment with circuits. Its advanced simulation engine can handle both analog and digital circuits and features realtime always-on analysis. It is the perfect companion to students, hobbyists, and engineers.

You use it as you would any CAD program: you add elements, connect them together, and set their properties. But iCircuit is unlike other CAD programs because it is always simulating. It's just like working with the real circuit. You do not stop to take a measurement or spend a lot of time configuring reports. Instead, you just play with the circuit as you normally would, with the power on!

There are over 30 elements you can use to build your circuits. The app has everything from simple resistors, to switches, to MOSFETS, to digital gates.

The app features a multimeter that you use to probe around the circuit to instantly read voltages and currents. If you want to see how a value changes over time, then you can add values to the built-in oscilloscope. The scope can simultaneously track many signals over time and features a variety of automatic modes that make it easy for you to grasp the behavior of your circuit.

You can even export your circuits and PNGs, PDFs, and SVG files so that they are easy to include in reports or web sites. Scope data can even be exported for offline analysis.

See a tutorial videos at:

Supported elements include:

• Signal generators, Voltage sources, and Current sources
• Resistors, Capacitors, Inductors, Potentiometers, Regulators
• SPST/SPDT Switches, Relays, and Transformers
• Diodes, BJ Transistors, and MOSFETs
• Speakers, Microphones, Buzzers, DC Motors, and LEDs
• Op-amps, ADCs, and DACs
• Logic gates: AND, OR, NAND, NOR, XOR
• JK and D Flip-flops
• Over 30 74XX series ICs

What's New in Version 1.8

• Addition of in-circuit gauges to always have measurements on the screen
• Addition of 6 CMOS ICs (4000, 4001, 4002, 4011, 4017, 4051, keep requesting on the uservoice!)
• Improved wire selection
• 64-bit support
• Lots of bug fixes


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Customer Reviews

Great, but with some issues.

For years I’ve used iCircuit on my iOS devices. I really wanted an OSX version and so glad it is finally here. The iCloud integration seems to work, or at least, as well as iCloud does anyway. It would be nice to have the option to use Dropbox instead, which is FAR more reliable.

Drawing circuits can be a little cumbersome. There’s still a touch-based element to the UX. Sometimes wires don’t auto-rubberband around corners like I’d expect. Or when I try to resize something, it ends up moving. These are the issues that irritate, but don’t make the app unusable.

For quickly drawing together a circuit for explanation or verification, iCircuit is one of the best simulators out there. Now with multiple platform support, it is one of my favorite apps to use on my desk or on the go.

Great App for anyone learning circuit design

This is a great app for students and also for teaching circuits. The best features are the realtime simulation while playing with the components, and the ability to drag and drop build circuits. This makes this a much more enjoyable process than using LTspice or similar. Of course, there are some drawbacks to this not being a spice simulator, but for learning basic circuit concepts it is ideal. I can only say: Buy it!

Update Broke It! [Fixed, should be a new update soon]

*UPDATE* - Got a response from my original request on the support page - another update should be coming out soon that fixes the issue I had. Was given temporary patch to use until then as well, which works so far.

I bought iCircuit on March 18th, used it (with OSX 10.9.5), saved my file, then updated to the new version when it came out a couple days later - now I can’t open my saved file, or even a new file. Submitted the issue to the support page and haven’t heard anything.

It was great while it worked! I’d love for it to work again so I can continue using it!

View in Mac App Store
  • $9.99
  • Category: Productivity
  • Updated:
  • Version: 1.8
  • Size: 3.9 MB
  • Language: English
  • Seller:

Compatibility: OS X 10.6 or later, 64-bit processor

Customer Ratings

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